Emulator on PS3..............?

May be...

Is there any way of installing an NES Emulator on my PS3 without doing the whole Linux hack blah blah blah stuff.

Nope, currently only Homebrew game direct on Ps3 is Pong, and that uses a coding for Blu-Ray menu systm, so isnt exactly huge, or NES emulator.

Linux is the only way to go.

Yes Look up Java emulators, although it doesnt produce any sound as of yet.

nope